Packing ring



Patented Sep 12, 1922a STATES iinwn'nn it. mania. orfloiiioaeo, intiitors.

' madame ante;

Original application filed une ,--.ierz, se ia at. 172304. Divided 'aii'dth is application as master as, 1917'. Serial No. 204,310. I r 1 T0 all whom it may concern." v

Be it known that I, EDWARD R NQRMAN, a citizen of the United States, lsldl ng at Chicago, in the county of Cook and State of Illinois, have inventedcertain new and useful Improvements in Packing Rings, which the following is a specification, reference being ha'd therein totheaccompanying drawing. 1

My inventi" n relates to packing rings, and consists in the matters hereinafter described and then pointed out infth'e claims, this ap} pli'cation being a division oi-m prior'ap'plh cation filed June 1, 1917, and bearing Serial Number 172,60d, series of 1915, patented Jan. 28, 1919, No. 1,292,633.

In the accompanying drawings,

Fig. ,lis a side view of the ring with the joint closed;

Fig. 2 is a detail plan view wit'h the joint closed;

Fig. 3 is a detail perspective view with the joint closed;

Fig. 4: is a detail plan view of the ring with its joint open to better show the construction of its parts;

Fig. 5 is a similar side view;

Fig. '6 is a detail side view of the ring showing the joint extended but forming a seal when the ring is expanded, and

Fig. 7 is a similar plan View.

The ring R is made from an oval blank which may be individually cast or cut from a pot-casting, with the scale of harder metal resulting from the chilling of the inner and outer surfaces removed from its outer surface or periphery but retained on its inner surface, the sides of the blank being rough ground to the desired width of the ring. The blank is larger than the ring desired and is suitably divided, and the ends are cut or milled to form the joint by removing sufficient material so that the finished ring is circular when the joint is closed, preferably by the process which forms part of the subject-matter of my above designated application.

The opposite ends of the ring are formed with laterally overlapping tongues 10 and 11 disposed on the opposite sides of the median line of the width of the ring as shown in Figs. 2 and 7 the removal of the metal to form the tongues providing corresponding recesses which are on opposite sides of said median line and are respectively disposed in the line of the tongues 10 and 11. Each tongue is composed of agbody 'w and to, respectlvely, of thesame thickness I as the ring itself, and a --radially reduced end portion formed by cutting away its inner face, eaolrrec'ess is provided at its base with a shoulder 12 and'13, respectively, each adapted to oo-act with the opposite reduced tongue-end; Each tongue and its opposed shoulderv have opposite bearing or, seating surfaces which are "cu'rved on a radius greater than but 'concentricg with the radius ofthe blank at its point of division so thatwhen the joint is fclo'sed the ring is clrcularand the opposite seats are extended or PI'OlOI lgGCl in the circumferential line of thefinished ring concentric with itscurvature to closewithout frictionor binding and form "a circumferential-11y elongated seal havinga flgreat'erlarea or extent than the mere j v used. *The ta -a, 10 is provided on its inne1--face with a bearing or seating surface 00 formed by cutting away a portion of its inner surface to a depth preferably equal to about half the thickness of the ring, the base of the seat being rounded as at 2 and the tip of the tongue being also rounded as at y; the opposite shoulder 12 is provided with a co-operating seat :0 formed with a rounded base 2 to receive the tip 7; and with a rounded tip g to fit the base 2 of the seat 02 provided on its inner face with a bearing or seating surfacew having a rounded tip y and a rounded base a, and the opposite shoulder 13 is similarly provided with a cooperat-ing seat 22 having arounded base 2 to receive the tip y and a rounded tip to fit the base 2' of the seat 00. The parts are so formed that when the opposing seats are engaged the peripheries of the tongues are flush with each other and on the same circumference as the body of the ring, and

preferably each tongue and shoulder is equal to half the thickness of the ring. When the line or edge seal now generally The tongue 11 is similarly as the ring itself are of such length circumferentially that they overlap when the joint is extended by the expansion of the ring, andthe co-acting seats on the tongues and shoulders are similarly circumferentially elongated and are concentric with the curvature of the ring so that they remain in extended contact whether the ring is entirely closed as when the contour of the confining cylinder walls hold it in this position as in Figs. 1 and 3, or is only partly closed as when for example it expands to fit an oversized or a worn cylinder as in Figs. 6 and 7. In short, the joint is provided with circumferentially co-operative seats which retain extended contact when the diameter of the ring isincreased and permits the ring to retain its circular form at all times without affecting its sealing capacity. Also, the tongues are external or on the outer surface of the ring, and consequently each inner shoulder interlocks With its tongue to resist the pressure on either side of thejoint and neither portion of the joint can open radially, while at the same time the tongues are not confined by the opposite ends of the ring but can freely expand or move outwardly when the ring is opened to fit over the associated piston, and then freely reseat on the Shoulders without any hand-fitting and without abutting against the shoulders when the ring is compressed into the piston groove by insertion in the associated cylinder, so that the liability of the tongues to break ofi", which is an objection where the tongues are inside the ring, is obviated by my invention. The shoulderson the inner surface of the ring are integral along one side with the corresponding tongues, and so are reinforced against breakage.

I claim 1- 1. A transversely split packing ring having on each of its endsan outer projection and an inner shoulder, the projection on one end fitting over and contacting with the shoulder on the opposite end and the projections and shoulders all extending transversely of the ring to a common circumferential plane.

2. A transversely splitpacking ring having on each of its ends an outer projection and an inner shoulder, the projection on one end fitting over and contacting with the shoulder on the opposite end and the projeotions and shoulders all extending transversely of the ring to the median circumferential plane of the ring.

In testimony whereof I afiix my signature in presence of two witnesses.

EDWARD R. NORMAN lVitnesses AMos B. WHI'I'ILE. J. MGROBERTS. 

